PATHOLOGY

Detailed explanation-1: -White blood cells are the key players in your immune system. They are made in your bone marrow and are part of the lymphatic system. White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi.

Detailed explanation-2: -Effector cells of innate immunity Phagocytic cells consist of granulocytes (i.e., neutrophils, eosinophils, basophils, and mast cells), monocytes/macrophages, and dendritic cells. These cells participate in not only the phagocytosis but also the inflammatory process.

Detailed explanation-3: -Immune responses require the coordinated action of leukocytes that travel the body to eliminate threats posed by trauma, infection, toxins, and cancer. Leukocytes communicate via direct contact and via production and receipt of soluble proteins and intercellular messenger proteins called cytokines.

Detailed explanation-4: -Antibodies are compounds of protein and sugar that circulate in the bloodstream. They are created by the immune system to fight germs and foreign substances. Antibodies can quickly detect germs and other potentially harmful substances, and then attach to them.